Managing Storage Overview

In the chapter Managing Storage some important points are given below

  • Today’s drives are either IDE drives (mostly found on consumer computers) or SCSI drives (mostly found in servers).
  • A redundant array of independent disks (RAID) uses two or more drives in combination to create a fault-tolerant system that protects against physical hard drive failure and increase hard drive performance.
  • With striping (RAID 0), all available hard drives are combined into a single large virtual file system, with the file system’s blocks arrayed so that they are spread evenly across all the drives.  Unfortunately, striping offers no fault tolerance.
  • Disk mirroring (RAID 1) copies a disk or partition onto a second hard drive. Then, as information is written, it is written to both hard drives simultaneously.
  • RAID 5 is similar to striping except that one of the hard drives is used for parity (error correction) to provide fault tolerance.
  • RAID 1″0 is a mirrored dataset (RAID 1), which is then striped (RAID 0).
  • When a drive fails, some systems use hot spares so that the system will automatically replace the failed drive and rebuild or restore the missing .
  • Network attached storage (NAS) is a file-level data storage device that is connected to a computer network to provide shared drives or folders, usually using SMB.
  • A storage area network (SAN) is an architecture used for disk arrays, tape libraries, and optical jukeboxes to appear as locally attached drives on a server.
  • A host adapter, sometimes referred to as host bus adapter (HBA), connects a host system such as a computer to a network or storage devices.
  • Logical unit numbers (usually referred to as LUNs) allow a SAN to break its storage into manageable pieces, which are then assigned to one or more servers in the SAN.
  • Fibre Channel and iSCSI are gigabit-speed technologies primarily used for storage networking.
  • Microsoft Windows Server 2008 includes two iSCSI Initiator software interfaces (iSCSI Initiator and iSCSICLI command interface) to connect an iSCSI storage array or volume of a storage array to a server and mount the array or volume as a local volume.
  • Windows Server 2008 includes Storage Explorer and Storage Manager for SANs to manage Fibre Channel, iSCSI fabrics, and LUNs.
  • Partitioning is defining and dividing a physical or virtual disk into logical volumes called partitions. Each partition functions as if it were a separate disk drive that can be assigned a drive letter.
  • Formatting a disk prepares the disk’s file system.
  • Windows Server 2008 supports two types of disk partitioning styles: Master Boot Record (MBR) and GUID Partition Table (GPT).
  • In Windows Server 2008, a basic disk is the same type of disk found in earlier versions of Windows.
  • When using MBR, basic disks gave you either four primary partitions or three primary partitions and one extended partition.
  • Dynamic disks offer increased flexibility, including up to 2,000 volumes and the ability to extend or shrink a disk without requiring a reboot.
  • Dynamic disks support five types of volumes: simple volumes, spanned volumes, striped volumes, mirrored volumes, and RAID-5 volumes.
  • A file system is a method of storing and organizing computer files and the data they contain to make it easy to find and access this information. A file system also maintains the physical location of the files so you can find and access the files in the future.
  • Currently, NTFS is the preferred file system, in part because it supports much larger hard disks (up to 16 exabytes) and long filenames.
  • NTFS is a journaling file system that makes sure a disk transaction is written properly before it is recognized.
  • NTFS offers better security through permissions and encryption.
  • The main tool used to manage disks in Windows Server 2008 is the MMC snap-in called Disk Management, which is also part of the Computer and Management consoles.
  • When you prepare a volume in Windows, you can assign a drive letter to the new volume, or you can create a mount point to the new volume as an empty NTFS folder.

Topics discussed in this chapter Managing Storage are

Identifying Storage Technologies

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Looking at Network Attached Storage and Storage Area Networks

For larger corporations, servers may connect to centralized devices that contain large amounts of storage. These devices offer better performance ...
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Understanding Disk Structure

Before you use a disk, you must prepare the disk for usage by creating partitions or volumes and formatting the ...
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Using Disk Management Tools

The main disk management tool in Windows Server 2008 is the MMC snap-in called Disk Management, which is also part ...
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This chapter is a part of 98-365 Windows Server Administration Fundamentals Prep course. More chapters in this course are

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The Practice tests included in this course are:

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98-365 Windows Server Administration Fundamentals Practice Test 2

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98-365 Windows Server Administration Fundamentals Practice Test 5

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98-365 Windows Server Administration Fundamentals Practice Test 4

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98-365 Windows Server Administration Fundamentals Practice Test 3

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